new CubeList method to extract over common coord values
BLD: Upddated INSTALL for build and runtime deps.
Changed to generator comprehension
Added load support for lblev=9999 mapping
Removed ambiguity around points/bounds dimensionality
Load raw reduced grids from GRIB files.
Added decimal keyword to assertMaskedArrayAlmostEqual, to match non-masked version.
Update gitignore file to ignore example test results.
Clarified user guide on loading Brewer palettes. Closes #1092.
Merge pull request #1096 from ajdawson/brewer-docs

Clarified user guide on loading Brewer palettes.
Merge pull request #1095 from ajdawson/image-output-gitignore

Update gitignore file to ignore example test results.
Review actions
Merge pull request #1067 from esc24/lblev_9999

Support for LBLEV of 9999
Fixed use of undefined exception
Merge pull request #1100 from esc24/commanderrfix

Fixed use of undefined exception
BUG: Changed precision when wrapping points.
MAINT: Reverting dtype change in interpolator
Clarify Cube methods which do not support lazy evaluation.
Merge pull request #1102 from rhattersley/clarify-non-lazy

Clarify Cube methods which do not support lazy evaluation.
Ocean sigma over z NetCDF loading.